Michigan Former Michigan Coach Greg Mattison Set To Retire Published January 22, 2021 After two seasons in Columbus before several in Ann Arbor, former DC and DL coach Greg Mattison is set to retire: Ohio State co-defensive coordinator Greg Mattison is retiring, Ryan Day just announced. pic.twitter.com/iHqyU5erNX — Tom VanHaaren (@TomVH) January 22, 2021 In this article: Recent Posts OSU Loses Out On Top In-State Recruit To ACC Program Positive Rumblings In Michigan’s Pursuit Of A Five-Star QB Michigan Predicted To Land Elite ’26 TE Recruit Michigan QB Announces Transfer Destination Surprising B1G Program Looks Primed To Land No. 3 Overall ’26 Recruit